Question at position 4 Match the hazard to the descriptionPrompt 1Ash mixed with waterAnswer for prompt 1 Ash mixed with water[input]Prompt 2Fast moving cloud of gas and ash that is more dilute and can thus travel faster and up and over ridgesAnswer for prompt 2 Fast moving cloud of gas and ash that is more dilute and can thus travel faster and up and over ridges[input]Prompt 3Fast moving cloud of gas and ash that is more concentrated and tends to be confined to valleysAnswer for prompt 3 Fast moving cloud of gas and ash that is more concentrated and tends to be confined to valleys[input]Prompt 4Ash that can pose a hazard to airplanes and roofsAnswer for prompt 4 Ash that can pose a hazard to airplanes and roofs[input]Possible answersLava flowsLaharsAsh fallPyroclastic flowLava bombsPyroclastic surge多项填空题